package net.xdclass.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import lombok.extern.slf4j.Slf4j;
import net.xdclass.component.PayFactory;
import net.xdclass.config.RabbitMQConfig;
import net.xdclass.constant.CacheKey;
import net.xdclass.constant.TimeConstant;
import net.xdclass.enums.*;
import net.xdclass.exception.BizException;
import net.xdclass.feign.CouponFeignSerivce;
import net.xdclass.feign.ProductFeignService;
import net.xdclass.feign.UserFeignService;
import net.xdclass.interceptor.LoginInterceptor;
import net.xdclass.mapper.ProductOrderItemMapper;
import net.xdclass.mapper.ProductOrderMapper;
import net.xdclass.model.LoginUser;
import net.xdclass.model.OrderMessage;
import net.xdclass.model.ProductOrderDO;
import net.xdclass.model.ProductOrderItemDO;
import net.xdclass.request.*;
import net.xdclass.service.ProductOrderService;
import net.xdclass.util.CommonUtil;
import net.xdclass.util.JsonData;
import net.xdclass.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 小滴课堂,愿景：让技术不再难学
 *
 * @Description
 * @Author 二当家小D
 * @Remark 有问题直接联系我，源码-笔记-技术交流群
 * @Version 1.0
 **/

@Service
@Slf4j
public class ProductOrderServiceImpl implements ProductOrderService {

    @Autowired
    private ProductOrderMapper productOrderMapper;

    @Autowired
    private UserFeignService userFeignService;


    @Autowired
    private ProductFeignService productFeignService;


    @Autowired
    private CouponFeignSerivce couponFeignSerivce;


    @Autowired
    private ProductOrderItemMapper orderItemMapper;



    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private RabbitMQConfig rabbitMQConfig;


    @Autowired
    private PayFactory payFactory;



    @Autowired
    private StringRedisTemplate redisTemplate;

    /**
     * * 防重提交
     * * 用户微服务-确认收货地址
     * * 商品微服务-获取最新购物项和价格
     * * 订单验价
     *   * 优惠券微服务-获取优惠券
     *   * 验证价格
     * * 锁定优惠券
     * * 锁定商品库存
     * * 创建订单对象
     * * 创建子订单对象
     * * 发送延迟消息-用于自动关单
     * * 创建支付信息-对接三方支付
     *
     * @param orderRequest
     * @return
     */
    @Override
    @Transactional
    public JsonData confirmOrder(ConfirmOrderRequest orderRequest) {

        LoginUser loginUser = LoginInterceptor.threadLocal.get();

        String orderToken = orderRequest.getToken();
        if(StringUtils.isBlank(orderToken)){
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_TOKEN_NOT_EXIST);
        }
        //原子操作 校验令牌，删除令牌
        String script = "if redis.call('get',KEYS[1]) == ARGV[1] then return redis.call('del',KEYS[1]) else return 0 end";

        Long result = redisTemplate.execute(new DefaultRedisScript<>(script,Long.class), Arrays.asList(String.format(CacheKey.SUBMIT_ORDER_TOKEN_KEY,loginUser.getId())),orderToken);
        if(result == 0L){
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_TOKEN_EQUAL_FAIL);
        }

        String orderOutTradeNo = CommonUtil.getStringNumRandom(32);


        //获取收货地址详情
        ProductOrderAddressVO addressVO = this.getUserAddress(orderRequest.getAddressId());

        log.info("收货地址信息:{}",addressVO);

        //获取用户加入购物车的商品
        List<Long> productIdList = orderRequest.getProductIdList();

        JsonData cartItemDate = productFeignService.confirmOrderCartItem(productIdList);
        List<OrderItemVO> orderItemList  = cartItemDate.getData(new TypeReference<>(){});
        log.info("获取的商品:{}",orderItemList);
        if(orderItemList == null){
            //购物车商品不存在
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_CART_ITEM_NOT_EXIST);
        }

        //验证价格，减去商品优惠券
        this.checkPrice(orderItemList,orderRequest);

        //锁定优惠券
        this.lockCouponRecords(orderRequest ,orderOutTradeNo );

        //锁定库存
        this.lockProductStocks(orderItemList,orderOutTradeNo);


        //创建订单
        ProductOrderDO productOrderDO = this.saveProductOrder(orderRequest,loginUser,orderOutTradeNo,addressVO);

        //创建订单项
        this.saveProductOrderItems(orderOutTradeNo,productOrderDO.getId(),orderItemList);

        //发送延迟消息，用于自动关单
        OrderMessage orderMessage = new OrderMessage();
        orderMessage.setOutTradeNo(orderOutTradeNo);
        rabbitTemplate.convertAndSend(rabbitMQConfig.getEventExchange(),rabbitMQConfig.getOrderCloseDelayRoutingKey(),orderMessage);


        //创建支付
        PayInfoVO payInfoVO = new PayInfoVO(orderOutTradeNo,
                productOrderDO.getPayAmount(),orderRequest.getPayType(),
                orderRequest.getClientType(), orderItemList.get(0).getProductTitle(),"",TimeConstant.ORDER_PAY_TIMEOUT_MILLS);

        String payResult = payFactory.pay(payInfoVO);
        if(StringUtils.isNotBlank(payResult)){
            log.info("创建支付订单成功:payInfoVO={},payResult={}",payInfoVO,payResult);
            return JsonData.buildSuccess(payResult);
        }else {
            log.error("创建支付订单失败:payInfoVO={},payResult={}",payInfoVO,payResult);
            return JsonData.buildResult(BizCodeEnum.PAY_ORDER_FAIL);
        }

    }

    /**
     * 新增订单项
     * @param orderOutTradeNo
     * @param id
     * @param orderItemList
     */
    private void saveProductOrderItems(String orderOutTradeNo, Long orderId, List<OrderItemVO> orderItemList) {


        List<ProductOrderItemDO> list = orderItemList.stream().map(
                obj->{
                    ProductOrderItemDO itemDO = new ProductOrderItemDO();
                    itemDO.setBuyNum(obj.getBuyNum());
                    itemDO.setProductId(obj.getProductId());
                    itemDO.setProductImg(obj.getProductImg());
                    itemDO.setProductName(obj.getProductTitle());

                    itemDO.setOutTradeNo(orderOutTradeNo);
                    itemDO.setCreateTime(new Date());

                    //单价
                    itemDO.setAmount(obj.getAmount());
                    //总价
                    itemDO.setTotalAmount(obj.getTotalAmount());
                    itemDO.setProductOrderId(orderId);
                    return itemDO;
                }
        ).collect(Collectors.toList());


        orderItemMapper.insertBatch(list);


    }

    /**
     * 创建订单
     * @param orderRequest
     * @param loginUser
     * @param orderOutTradeNo
     * @param addressVO
     */
    private ProductOrderDO saveProductOrder(ConfirmOrderRequest orderRequest, LoginUser loginUser, String orderOutTradeNo, ProductOrderAddressVO addressVO) {

        ProductOrderDO productOrderDO = new ProductOrderDO();
        productOrderDO.setUserId(loginUser.getId());
        productOrderDO.setHeadImg(loginUser.getHeadImg());
        productOrderDO.setNickname(loginUser.getName());

        productOrderDO.setOutTradeNo(orderOutTradeNo);
        productOrderDO.setCreateTime(new Date());
        productOrderDO.setDel(0);
        productOrderDO.setOrderType(ProductOrderTypeEnum.DAILY.name());

        //实际支付的价格
        productOrderDO.setPayAmount(orderRequest.getRealPayAmount());

        //总价，未使用优惠券的价格
        productOrderDO.setTotalAmount(orderRequest.getTotalAmount());
        productOrderDO.setState(ProductOrderStateEnum.NEW.name());
        productOrderDO.setPayType(ProductOrderPayTypeEnum.valueOf(orderRequest.getPayType()).name());

        productOrderDO.setReceiverAddress(JSON.toJSONString(addressVO));

        productOrderMapper.insert(productOrderDO);

        return productOrderDO;

    }

    /**
     * 锁定商品库存
     * @param orderItemList
     * @param orderOutTradeNo
     */
    private void lockProductStocks(List<OrderItemVO> orderItemList, String orderOutTradeNo) {

       List<OrderItemRequest> itemRequestList = orderItemList.stream().map(obj->{

            OrderItemRequest request = new OrderItemRequest();
            request.setBuyNum(obj.getBuyNum());
            request.setProductId(obj.getProductId());
            return request;
        }).collect(Collectors.toList());


        LockProductRequest lockProductRequest = new LockProductRequest();
        lockProductRequest.setOrderOutTradeNo(orderOutTradeNo);
        lockProductRequest.setOrderItemList(itemRequestList);

        JsonData jsonData = productFeignService.lockProductStock(lockProductRequest);
        if(jsonData.getCode()!=0){
            log.error("锁定商品库存失败：{}",lockProductRequest);
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_LOCK_PRODUCT_FAIL);
        }
    }

    /**
     * 锁定优惠券
     * @param orderRequest
     * @param orderOutTradeNo
     */
    private void lockCouponRecords(ConfirmOrderRequest orderRequest, String orderOutTradeNo) {
        List<Long> lockCouponRecordIds = new ArrayList<>();
        if(orderRequest.getCouponRecordId()>0){
            lockCouponRecordIds.add(orderRequest.getCouponRecordId());

            LockCouponRecordRequest lockCouponRecordRequest = new LockCouponRecordRequest();
            lockCouponRecordRequest.setOrderOutTradeNo(orderOutTradeNo);
            lockCouponRecordRequest.setLockCouponRecordIds(lockCouponRecordIds);

            //发起锁定优惠券请求
            JsonData jsonData = couponFeignSerivce.lockCouponRecords(lockCouponRecordRequest);
            if(jsonData.getCode()!=0){
                throw new BizException(BizCodeEnum.COUPON_RECORD_LOCK_FAIL);
            }
        }

    }

    /**
     * 验证价格
     * 1）统计全部商品的价格
     * 2) 获取优惠券(判断是否满足优惠券的条件)，总价再减去优惠券的价格 就是 最终的价格
     *
     * @param orderItemList
     * @param orderRequest
     */
    private void checkPrice(List<OrderItemVO> orderItemList, ConfirmOrderRequest orderRequest) {

        //统计商品总价格
        BigDecimal realPayAmount = new BigDecimal("0");
        if (orderItemList != null) {
            for(OrderItemVO orderItemVO : orderItemList){
                BigDecimal itemRealPayAmount = orderItemVO.getTotalAmount();
                realPayAmount = realPayAmount.add(itemRealPayAmount);
            }
        }

        //获取优惠券，判断是否可以使用
        CouponRecordVO couponRecordVO = getCartCouponRecord(orderRequest.getCouponRecordId());

        //计算购物车价格，是否满足优惠券满减条件
        if(couponRecordVO!=null){

            //计算是否满足满减
            if(realPayAmount.compareTo(couponRecordVO.getConditionPrice()) < 0){
                throw new BizException(BizCodeEnum.ORDER_CONFIRM_COUPON_FAIL);
            }
            if(couponRecordVO.getPrice().compareTo(realPayAmount)>0){
                realPayAmount = BigDecimal.ZERO;

            }else {
                realPayAmount = realPayAmount.subtract(couponRecordVO.getPrice());
            }

        }

        if(realPayAmount.compareTo(orderRequest.getRealPayAmount()) !=0 ){
            log.error("订单验价失败：{}",orderRequest);
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_PRICE_FAIL);
        }
    }

    /**
     * 获取优惠券
     * @param couponRecordId
     * @return
     */
    private CouponRecordVO getCartCouponRecord(Long couponRecordId) {

        if(couponRecordId ==null || couponRecordId < 0){
            return null;
        }

        JsonData couponData = couponFeignSerivce.findUserCouponRecordById(couponRecordId);

        if(couponData.getCode()!=0){
            throw new BizException(BizCodeEnum.ORDER_CONFIRM_COUPON_FAIL);
        }

        if(couponData.getCode()==0){

            CouponRecordVO couponRecordVO = couponData.getData(new TypeReference<>(){});

            if(!couponAvailable(couponRecordVO)){
                log.error("优惠券使用失败");
                throw new BizException(BizCodeEnum.COUPON_UNAVAILABLE);
            }
            return couponRecordVO;
        }

        return null;
    }

    /**
     * 判断优惠券是否可用
     * @param couponRecordVO
     * @return
     */
    private boolean couponAvailable(CouponRecordVO couponRecordVO) {

        if(couponRecordVO.getUseState().equalsIgnoreCase(CouponStateEnum.NEW.name())){
            long currentTimestamp = CommonUtil.getCurrentTimestamp();
            long end = couponRecordVO.getEndTime().getTime();
            long start = couponRecordVO.getStartTime().getTime();
            if(currentTimestamp>= start && currentTimestamp<=end){
                return true;
            }
        }
        return false;
    }

    /**
     * 获取收货地址详情
     * @param addressId
     * @return
     */
    private ProductOrderAddressVO getUserAddress(long addressId) {

        JsonData addressData = userFeignService.detail(addressId);

        if(addressData.getCode() !=0){
            log.error("获取收获地址失败,msg:{}",addressData);
            throw new BizException(BizCodeEnum.ADDRESS_NO_EXITS);
        }

        ProductOrderAddressVO addressVO = addressData.getData(new TypeReference<>(){});

        return addressVO;
    }


    /**
     * 查询订单状态
     * @param outTradeNo
     * @return
     */
    @Override
    public String queryProductOrderState(String outTradeNo) {
        ProductOrderDO productOrderDO = productOrderMapper.selectOne(new QueryWrapper<ProductOrderDO>().eq("out_trade_no",outTradeNo));

        if(productOrderDO == null){
            return "";
        }else {
            return productOrderDO.getState();
        }

    }


    /**
     * 定时关单
     * @param orderMessage
     * @return
     */
    @Override
    public boolean closeProductOrder(OrderMessage orderMessage) {

        ProductOrderDO productOrderDO = productOrderMapper.selectOne(new QueryWrapper<ProductOrderDO>().eq("out_trade_no",orderMessage.getOutTradeNo()));

        if(productOrderDO == null){
            //订单不存在
            log.warn("直接确认消息，订单不存在:{}",orderMessage);
            return true;
        }

        if(productOrderDO.getState().equalsIgnoreCase(ProductOrderStateEnum.PAY.name())){
            //已经支付
            log.info("直接确认消息,订单已经支付:{}",orderMessage);
            return true;
        }

        //向第三方支付查询订单是否真的未支付
        PayInfoVO payInfoVO = new PayInfoVO();
        payInfoVO.setPayType(productOrderDO.getPayType());
        payInfoVO.setOutTradeNo(orderMessage.getOutTradeNo());
        String payResult = payFactory.queryPaySuccess(payInfoVO);

        //结果为空，则未支付成功，本地取消订单
        if(StringUtils.isBlank(payResult)){
            productOrderMapper.updateOrderPayState(productOrderDO.getOutTradeNo(),ProductOrderStateEnum.CANCEL.name(),ProductOrderStateEnum.NEW.name());
            log.info("结果为空，则未支付成功，本地取消订单:{}",orderMessage);
            return true;
        }else {
            //支付成功，主动的把订单状态改成UI就支付，造成该原因的情况可能是支付通道回调有问题
            log.warn("支付成功，主动的把订单状态改成UI就支付，造成该原因的情况可能是支付通道回调有问题:{}",orderMessage);
            productOrderMapper.updateOrderPayState(productOrderDO.getOutTradeNo(),ProductOrderStateEnum.PAY.name(),ProductOrderStateEnum.NEW.name());
            return true;
        }


    }

    /***
     * 支付通知结果更新订单状态
     * @param alipay
     * @param paramsMap
     * @return
     */
    @Override
    public JsonData handlerOrderCallbackMsg(ProductOrderPayTypeEnum payType, Map<String, String> paramsMap) {


        //MQ投递 --》在慢慢消费


        if(payType.name().equalsIgnoreCase(ProductOrderPayTypeEnum.ALIPAY.name())){
            //支付宝支付
            //获取商户订单号
            String outTradeNo = paramsMap.get("out_trade_no");
            //交易的状态
            String tradeStatus = paramsMap.get("trade_status");

            if("TRADE_SUCCESS".equalsIgnoreCase(tradeStatus) || "TRADE_FINISHED".equalsIgnoreCase(tradeStatus)){
                //更新订单状态
                productOrderMapper.updateOrderPayState(outTradeNo,ProductOrderStateEnum.PAY.name(),ProductOrderStateEnum.NEW.name());
                return JsonData.buildSuccess();
            }

        } else if(payType.name().equalsIgnoreCase(ProductOrderPayTypeEnum.WECHAT.name())){
            //微信支付  TODO
        }

        return JsonData.buildResult(BizCodeEnum.PAY_ORDER_CALLBACK_NOT_SUCCESS);
    }

    /**
     * 分页查询我的订单
     * @param page
     * @param size
     * @param state
     * @return
     */
    @Override
    public Map<String, Object> page(int page, int size, String state) {
        LoginUser loginUser = LoginInterceptor.threadLocal.get();

        Page<ProductOrderDO> pageInfo = new Page<>(page,size);

        IPage<ProductOrderDO> orderDOPage = null;

        if(StringUtils.isBlank(state)){
            orderDOPage = productOrderMapper.selectPage(pageInfo,new QueryWrapper<ProductOrderDO>().eq("user_id",loginUser.getId()));
        }else {
            orderDOPage = productOrderMapper.selectPage(pageInfo,new QueryWrapper<ProductOrderDO>().eq("user_id",loginUser.getId()).eq("state",state));
        }

        //获取订单列表
        List<ProductOrderDO> productOrderDOList =  orderDOPage.getRecords();

        List<ProductOrderVO> productOrderVOList =  productOrderDOList.stream().map(orderDO->{

            List<ProductOrderItemDO> itemDOList = orderItemMapper.selectList(new QueryWrapper<ProductOrderItemDO>().eq("product_order_id",orderDO.getId()));

            List<OrderItemVO> itemVOList =  itemDOList.stream().map(item->{
                OrderItemVO itemVO = new OrderItemVO();
                BeanUtils.copyProperties(item,itemVO);
                return itemVO;
            }).collect(Collectors.toList());

            ProductOrderVO productOrderVO = new ProductOrderVO();
            BeanUtils.copyProperties(orderDO,productOrderVO);
            productOrderVO.setOrderItemList(itemVOList);
            return productOrderVO;

        }).collect(Collectors.toList());

        Map<String,Object> pageMap = new HashMap<>(3);
        pageMap.put("total_record",orderDOPage.getTotal());
        pageMap.put("total_page",orderDOPage.getPages());
        pageMap.put("current_data",productOrderVOList);

        return pageMap;
    }



    @Override
    @Transactional
    public JsonData repay(RepayOrderRequest repayOrderRequest) {
        LoginUser loginUser = LoginInterceptor.threadLocal.get();

        ProductOrderDO productOrderDO = productOrderMapper.selectOne(new QueryWrapper<ProductOrderDO>().eq("out_trade_no",repayOrderRequest.getOutTradeNo()).eq("user_id",loginUser.getId()));

        log.info("订单状态:{}",productOrderDO);

        if(productOrderDO==null){
            return JsonData.buildResult(BizCodeEnum.PAY_ORDER_NOT_EXIST);
        }

        //订单状态不对，不是NEW状态
        if(!productOrderDO.getState().equalsIgnoreCase(ProductOrderStateEnum.NEW.name())){
            return JsonData.buildResult(BizCodeEnum.PAY_ORDER_STATE_ERROR);
        }else {
            //订单创建到现在的存活时间
            long orderLiveTime = CommonUtil.getCurrentTimestamp() - productOrderDO.getCreateTime().getTime();
            //创建订单是临界点，所以再增加1分钟多几秒，假如29分，则也不能支付了
            orderLiveTime = orderLiveTime + 70*1000;


            //大于订单超时时间，则失效
            if(orderLiveTime>TimeConstant.ORDER_PAY_TIMEOUT_MILLS){
                return JsonData.buildResult(BizCodeEnum.PAY_ORDER_PAY_TIMEOUT);
            }else {

                //记得更新DB订单支付参数 payType，还可以增加订单支付信息日志  TODO


                //总时间-存活的时间 = 剩下的有效时间
                long timeout = TimeConstant.ORDER_PAY_TIMEOUT_MILLS - orderLiveTime;
                //创建支付
                PayInfoVO payInfoVO = new PayInfoVO(productOrderDO.getOutTradeNo(),
                        productOrderDO.getPayAmount(),repayOrderRequest.getPayType(),
                        repayOrderRequest.getClientType(), productOrderDO.getOutTradeNo(),"",timeout);

                log.info("payInfoVO={}",payInfoVO);
                String payResult = payFactory.pay(payInfoVO);
                if(StringUtils.isNotBlank(payResult)){
                    log.info("创建二次支付订单成功:payInfoVO={},payResult={}",payInfoVO,payResult);
                    return JsonData.buildSuccess(payResult);
                }else {
                    log.error("创建二次支付订单失败:payInfoVO={},payResult={}",payInfoVO,payResult);
                    return JsonData.buildResult(BizCodeEnum.PAY_ORDER_FAIL);
                }

            }


        }




    }



}
